(BEIJING) - Chinese police freed four men found to be working as virtual slaves in a brink kiln in a case similar to one which shook the country last year, but lost three of them while trying to send them home, a report said on Friday. The four were free in late December in the northern province of Hebei, which surrounds Beijing, and had been working in appalling conditions at the kiln for up to a year, the China Youth Daily said. Some were suspected of being mentally disabled, and at least one was totally illiterate, knew neither his name...